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Stay informed with commentary and opinion pieces on the latest issues in science, technology, health and the environment, written by expert 91av journalists and world-leading researchers and thinkers.
Why do so many people believe aliens have visited Earth?

Space

Why do so many people believe aliens have visited Earth?

Despite testimony by David Grusch to US Congress about "non-human biologics" and UFO crash sites, there is still no evidence aliens have ever come to Earth. Why are people taking such claims seriously, asks Jacob Aron

Comment

We should all be curbing our water usage – before it's too late

Environment

We should all be curbing our water usage – before it's too late

Comment

Conspiracy theories are the new pandemic infecting public life

Society

Conspiracy theories are the new pandemic infecting public life

Comment

Social media brings benefits as well as risks to young people

Health

Social media brings benefits as well as risks to young people

Comment

We must address a key obstacle to our new age of space exploration

Space

We must address a key obstacle to our new age of space exploration

Comment

The real reason claims about the existential risk of AI are scary

Technology

The real reason claims about the existential risk of AI are scary

Comment

Why medical studies of diverse populations benefit humanity as a whole

Health

Why medical studies of diverse populations benefit humanity as a whole

Comment

Concern about dirty air can galvanise the fight against climate change

Environment

Concern about dirty air can galvanise the fight against climate change

Comment

Stylized head silhouette. Entangled threads instead of brains. Symbol of confused consciousness. Concept of mental health and disease; Shutterstock ID 1226274757; purchase_order: -; job: -; client: -; other: -

Mind

Why you shouldn't believe claims that there are 7 types of ADHD

Comment

Is it ethical to use complex mini-brains for artificial intelligence?

Technology

Is it ethical to use complex mini-brains for artificial intelligence?

Brain organoids could be more effective than silicon-based AIs at certain tasks. But as they grow more complex, when should we step in to protect their welfare, asks Michael Le Page

Comment

Health

Why we should do more to protect frogs and toads

Comment

Comment

Read an extract from The Ferryman by Justin Cronin

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Comment

Justin Cronin on the books, films and TV that inspired The Ferryman

Comment

Space

Why sending messages to extraterrestrials is controversial

Comment

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